Pyramids is the first of the 'deep' philosophy books and if nothing else deserves respect because it's the first proper and purposeful exploration of the Wrong Trouser Legs of Time (although Terry might not have said it 1st in there for the quote-nerds the theory's self-evident)

I love to hate agreeing with pooh!

No dithering for me it has to be the Witches on the basis that they're the most powerful and above all sensible people on the Disc. I like the Watch as much really, but they don't have Greebo (which is why they have the edge - even though I really love Gaspode regrettably he can't change his morphic field)...